Reliability and durability test

Test Background

During long-term operation, sensors need to withstand environmental stresses such as temperature changes, medium impact, and bubble interference. Insufficient reliability may lead to drift, failure, or false alarms, affecting the intelligent level of the system.

Test Introduction

The reliability and durability tests, including temperature cycling test, long-term stability test, bubble influence test, and medium viscosity influence test, simulate the long-term performance of the sensor under real working conditions.

Testing Objectives

Verify the accuracy retention after temperature cycling

Evaluate the zero and span drift during long-term operation

Detect the influence of bubbles on the measurement stability

Ensure the measurement accuracy under different medium viscosities

Test Standards

IEC 60068-2 Environmental test standard

GB/T 2423 Temperature change test

ISO 12242 Bubble influence test for ultrasonic flow meters

Customer-defined long-term stability requirements

Applicable Products/Fields

Suitable for long-term reliability verification of temperature, pressure, flow, and liquid leakage sensors in liquid cooling systems.

Test Content

Temperature cycling test: Temperature cycling from -40°C to 85°C, 100 cycles

Long-term stability test: Continuous operation for 1000 hours under rated conditions

Bubble influence test: Measurement error in a gas-containing medium

Medium viscosity influence test: Comparison of media with different viscosities

Accuracy comparison before and after aging

Project Advantages

Capable of simulating actual operating environmental stresses

Real-time monitoring of drift trends

Provides service life estimation and replacement recommendations

Laboratory Configuration

High and low temperature alternating test chamber

Long-term operation monitoring platform

Bubble generation and control system

Circulation system for media with different viscosities

Standard source (regular calibration)

FAQ
Q: How much is the flow sensor affected by bubbles? A: Bubbles can cause the attenuation or reflection of ultrasonic signals, leading to measurement fluctuations or even failures. It is required to avoid bubbles from entering the measurement section during system design.